Java：将文本文件的内容打印到屏幕

在Java 7之前：

 BufferedReader br = new BufferedReader(new FileReader("foo.txt")); String line; while ((line = br.readLine()) != null) {   System.out.println(line); }

• 添加异常处理
• 添加关闭流

从Java 7开始，无需关闭流，因为它实现了

autocloseable

try (BufferedReader br = new BufferedReader(new FileReader("foo.txt"))) {   String line;   while ((line = br.readLine()) != null) {       System.out.println(line);   }}